Didier Willis (April 25, 1971), a French IT engineer, is President of Le Dragon de Brume, a non-profit Tolkien association. He has written several articles and studies on Arda in the French e-zine Hiswelókë.
- 2011: Tolkien, le façonnement d'un monde, volume 1, botany and astronomy (editor)
- 2014: Tolkien, le façonnement d'un monde, volume 2, astronomy and geography (editor)
- Le Dragon de Brume (French)
- Hiswelókë (French)
- sindict - Mailing list for discussion about the development of the Sindarin dictionary.